<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script src="../static/vue/2.6.10/vue.js" type="text/javascript"></script>
    <title>todo</title>
</head>
<body>
    <div id="todo-list-example">
        <form @submit.prevent="addNewTodo">
            <label for="new-todo">Add a todo</label>
            <input v-model="newTodoText"
                   id="new-todo"
                   placeholder="E.g. Feed the cat">
            <button>Add</button>
        </form>
        <ul>
            <li is="todo-item"
                v-for="(todo, index) in todos"
                :key="todo.id"
                :title="todo.title"
                @remove="todos.splice(index, 1)">
            </li>
        </ul>
    </div>
</body>
<script type="text/javascript">
    Vue.component('todo-item', {
        template: '<li>{{title}}<button v-on:click="$emit(\'remove\')">Remove</button></li>',
        props: ['title']
    });

    let app = new Vue({
        el: '#todo-list-example',
        data: {
            newTodoText: '',
            todos: [
                {
                    id: 1,
                    title: 'Do the dishes',
                },
                {
                    id: 2,
                    title: 'Take out the trash',
                },
                {
                    id: 3,
                    title: 'Mow the lawn'
                }
            ],
            nextTodoId: 4
        },
        methods: {
            addNewTodo: function () {
                this.todos.push({
                    id: this.nextTodoId++,
                    title: this.newTodoText
                });
                this.newTodoText = ''
            }
        }
    })
</script>
</html>